1 Samuel 18:24

And Saul commanded his servants, saying, Commune with David secretly, and say, Behold, the king hath delight in thee, and all his servants love thee: now therefore be the king’s son in law.

And Saul’s servants spake those words in the ears of David. And David said, Seemeth it to you a light thing to be a king’s son in law, seeing that I am a poor man, and lightly esteemed?

And Saul said, Thus shall ye say to David, The king desireth not any dowry, but an hundred foreskins of the Philistines, to be avenged of the king’s enemies. But Saul thought to make David fall by the hand of the Philistines.

And when his servants told David these words, it pleased David well to be the king’s son in law: and the days were not expired.